Just wonderin' about how rim and tire size changes affect truck performance. I've got 245/75/16 steelies on my stock 2008 SR5 Access Cab now but recently bought a set of TRD Sport rims (17") that I'm about to buy new tires for (probably Firestone Destination ATs). Can I use stock 265/65/17 tires with these rims on my truck without screwing up my odometer, ABS or anything else?

I did the same exact swap you're talking about, I went from 245/75R16 to 265/65R17 and there are no effects on your speedo, ODO, ABS or any other akronym your truck has. They take a little more to turn so you might notice a slight drop in fuel economy. I lost about just under 2 MPG but I also went to a heavier and more aggressive tire than the stock dunlops.

Thanks for the feedback. I've no plans to lift the truck so that won't be a problem but I'm surprised the switch from 16" to 17" would drop mileage by 2 MPG, especially going from steelies to alloys (which I'm guessing are lighter). Still, I plan on putting on Firestone Destination ATs...not exactly a monster offroad tire but probably heavier and less of a mileage maker than the stock Dunlops. Some mileage trade-off might be worth it...those stock tires completely suck in snow. Anyway, thanks again.

BTW, if anyone has an extra 17" TRD Sport rim (or even a steelie that matches up) that you don't need I'd be glad to take it off your hands. I need a spare.

Thanks for the feedback. I've no plans to lift the truck so that won't be a problem but I'm surprised the switch from 16" to 17" would drop mileage by 2 MPG, especially going from steelies to alloys (which I'm guessing are lighter). Still, I plan on putting on Firestone Destination ATs...not exactly a monster offroad tire but probably heavier and less of a mileage maker than the stock Dunlops. Some mileage trade-off might be worth it...those stock tires completely suck in snow. Anyway, thanks again.

BTW, if anyone has an extra 17" TRD Sport rim (or even a steelie that matches up) that you don't need I'd be glad to take it off your hands. I need a spare.

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It may not drop your MPG that much, that's just what I saw with the swap I made, tires I chose and way I drive. I went from the stock dunlops on alloy baja wheels to an A/T tire on TRD Sport wheels. They are a wider tire so you might lose a little but I also travel hills and am in stop and go traffic.

Pugga, how's the ride/pavement noise/snow grip with your ATs compared to the Dunlops?

Have to wonder if the MPG thing might also be alot different based on our different truck specs, 4.0L auto vs. 2.7L 5-spd. Guess I'll find out once the new rims/tires go on.

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The snow/wet grip is great! We got dumped on with snow this year and these tires have kept me confidently planted on the road. I've had Coopers on a few trucks in the past and haven't been disappointed yet, they handle very well in the snow and wet conditions. There is no comparison with the Dunlops at all, they'd spin just on wet pavement. The Coopers are a little noisier, but not much. The Cooper Discoverer ATR is a fairly mild mannered A/T tire. It's not as aggressive as say Duratracs or BFG A/Ts and they have a solid centerline to help reduce road noise. The ride is great, a little stiffer but they ride nice.

MPG's would definitely vary with the different trucks. I've got a double cab 4.0L auto with 4wd so it's already a much heavier truck. You may not see as much of a drop.

Cooper Discoverer ATRs were one of my finalists when I was checking brands and models...good choice, it rates out as a good tire. Unforetunately my truckfix kitty is a bit stretched after buying a new tonneau and set of TRD wheels. The Firestones rate out well for regular use and at under $150 each they should work fine for my needs...hopefully for the next 5 years or so, lol.